What do you want to ask Hillary Clinton? Send your questions here and CNN Chief International Correspondent Christiane Amanpour might ask it during CNN's town hall meeting with Clinton at 5 p.m. ET Tuesday at the Newseum in Washington.

(CNN) - As recently as 2011, Hillary Clinton was seen by many as a respected but polarizing figure: Smart and accomplished, sure, but controlled and somewhat humorless. In the infamous faint praise of her rival-turned-boss Barack Obama, she was "likable enough."

Three years later, she seems somehow hipper, looser and more ... human. As we inch toward the 2016 election, she's presented a new online persona.

(CNN) - When he wasn't laughing, Joe Biden sounded a like a belligerent old man.

Paul Ryan sipped from a cup and looked like a beleaguered altar boy.

Fair or not, those were just two characterizations of Thursday's vice presidential debate on Twitter, where a Greek chorus of jokesters kept up a witty commentary throughout the 90-minute event. As with any live TV event in the social media age, the people of Twitter let no gaffe or verbal tic go unnoticed.

(CNN) - As members of Congress navigate the shifting political sands of the debt-ceiling crisis, many of them are turning to a digital platform more associated with sharing personal updates and funny videos about cats: Facebook.

In recent days, lawmakers have swarmed the popular social network to post videos outlining their positions, conduct opinion polls, reach new constituents and ask for feedback.

(CNN) - Wireless service was spotty in downtown Washington on Tuesday morning as hundreds of thousands of people tried to share Barack Obama's historic inauguration through cell-phone calls and text messages to family and friends.

"I got some photos through earlier. But now they're just not going through," said Barbara Talisman of Chicago, Illinois, standing on the National Mall about 10 a.m. "People want to know what's happening, so I'm trying to send them live pictures."

Wireless carriers beefed up their Washington-area networks in anticipation of heavy cell-phone traffic, and as of 11 a.m., their efforts appeared to have paid off. Despite handling three to five times the usual volume of calls from the mall on Tuesday morning, Verizon Wireless reported few problems.

(CNN) - Eight years after Florida's hanging chads exasperated voters and helped usher in sweeping changes in voting technology, many election observers remain concerned about the accuracy of the electronic voting systems most Americans will use November 4.

Touch-screen machines can occasionally fail or register votes for unintended candidates. Optical-scan systems can have trouble reading paper ballots that are too long or marked with the wrong ink. At least one study suggests that electronic voting machines can be easily hacked.

And some 9 million voters, including many in the battleground states of Ohio and Florida, will use equipment that has changed since March, increasing concerns about errors next Tuesday.

"You can be almost certain that there will be irregularities in some places around the country," said Rep. Rush Holt, D-New Jersey. "The problem now is that roughly a third of voters nationwide will use unverifiable electronic machines. So if there are uncertainties, there will be no way to resolve them."

With early voting under way in 31 states, these problems have already surfaced. In recent weeks, voters in West Virginia, Colorado, Tennessee and Texas have reported that touch-screen machines registered their votes, at least initially, for the wrong candidate or party.